(19)
(11) EP 2 416 044 A3

(12) EUROPEAN PATENT APPLICATION

(88) Date of publication A3:
28.03.2012 Bulletin 2012/13

(43) Date of publication A2:
08.02.2012 Bulletin 2012/06

(21) Application number: 11187763.5

(22) Date of filing: 28.09.2007
(51) International Patent Classification (IPC): 
F16L 9/17(2006.01)
B32B 3/30(2006.01)
 F16L 59/14(2006.01)
F16L 59/02(2006.01)
(84) Designated Contracting States:
AT BE BG CH CY CZ DE DK EE ES FI FR GB GR HU IE IS IT LI LT LU LV MC MT NL PL PT RO SE SI SK TR

(30) Priority: 29.09.2006 GB 0619178
11.06.2007 GB 0711224

(62) Application number of the earlier application in accordance with Art. 76 EPC:
07823953.0 / 2079954

(71) Applicant: Spiralite Holdings Limited
Essex RM20 3EE (GB)

(72) Inventors:
  • Dudley, Peter
    Thundersley, Essex SS7 3DU (GB)
  • Merrien, Peter
    Tilbury, Essex RM18 7HH (GB)
  • Sewell, Kevin
    Peacehaven, East Sussex BN10 7SP (GB)

(74) Representative: Hill, Justin John et al
Ipulse (IP) Ltd. Carrington House 126-130 Regent Street
London W1B 5SE
London W1B 5SE (GB)

   


(54) Insulated ductwork products


(57) An intermediate insulating product (20) is disclosed comprising a planar insulating layer (11) having a top side in to which is formed a plurality of parallel channels (14) having cross-sections with tapered sides. A vapour proof layer (18) is applied to the top surface after the channels (14) have been formed such that the vapour proof layer (18) bridges the plurality of parallel channels (14). The intermediate insulating product (20) is then bent with mechanical manipulation in regions adjacent the bottom of the channels (14) thereby causing the channels (14) to close to form a non- planar, derivative insulated ductwork product and the vapour proof layer (18) forms a vapour proof inner lining (18) to the derivative insulated ductwork product (30).







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